Please follow this exactly to insure a reliable removal, installation and configuration of your computer! 
You will need to download and install CCleaner available at www.ccleaner.com . Just install the program for now, don’t run it yet!
Step 1: Uninstallation and removal of Adaptec Card.
The first step is to remove the Adaptec card. You should do this via the add/remove programs applet in the control panel. Remove any referring drivers and software. Do not remove the drivers from Device Manager unless there is no uninstall in the add/remove box.
After the uninstallation is complete, shut down your computer and remove the card from the PCI slot.
Reboot your computer and browse to the Program Files folder. Delete the Adaptec folder (if present) and any refering folder for that card.
Now you need to enter the registry to remove any obsolete entries. Click Start > Run > Type regedit > press enter.
Go to HKEY_CURRENT_USERS > SOFTWARE > Remove anything refering to Adaptec PCI card
Next go HKEY_LOCAL_MACHINE > SOFTWARE > Once again, remove the adaptec folder (if present) or anything refering to your card
Go to HKEY_USERS > S-1-5-21-910899857-1996886089-926709054-1554 (NORMALLY SECOND FROM LAST KEY) > SOFTWARE > Once again, remove the adaptec folder (if present) or anything refering to your card
Close the registry editor.
Open up CCleaner and click registry cleaner on the left hand side. Run the scan and remove all the errors it finds.
Step 2: Remove the PCI Sound Card
You should do exactly what you did in Step 1:
-Remove all software and drivers from the add/remove programs applet refering to your sound card
-Restart your computer and remove the sound card from the PCI slot
-Reboot your computer and remove the Prowler folder (if present) and all folders in Program Files which refer to your device (Prowler 4.1 DSP MadDog 8738)
-Enter the registry and follow the same structure as before
-Run CCleaner and run the registry cleaner.
Step 3: Removing and reinstalling the onboard AC’97
You need to restart you computer and enter the CMOS setup. Make sure your onboard sound card is enabled, then boot into Windows.
Windows might say ‘new hardware detected’. Let Windows install it own drivers and reboot if nescassary.
Let me know if this works without your adaptec card. If it does work, then we can tackle your Adaptec card next! 